Department of Materials Science and Engineering, Dalian Maritime University, Dalian, 116026, China.
J Mater Sci Mater Med. 2010 May;21(5):1421-6. doi: 10.1007/s10856-010-4002-z. Epub 2010 Feb 9.
The electrochemical behaviour of Ti-Ni shape memory alloy and Co-Cr alloys were investigated in dynamic Tyrode's simulated body fluid on a Model CP6 Potentiostat/Galvanostat. The results indicated that, for all alloys, the anodic dissolution and the pitting sensitivity increased with the flow rate of the Tyrode's solution increasing while the open-circuit potentials and pitting corrosion potentials decreased with the Tyrode's solution increasing. Pitting corrosion of Ti-Ni alloy was easier than Co-Cr alloys. Since the solution's flow enhanced oxygen transform and made it easy to reach the surface of electrodes, the plateau of oxygen diffusion control was diminished. All these indicated that the cathodic reduction and the corrosion reaction, which was controlled by the electrochemical mass transport process, were all accelerated in dynamic Tyrode's simulated body fluid.
在 CP6 恒电位/恒电流仪上，采用动态模拟体液（Tyrode's solution）研究了 Ti-Ni 形状记忆合金和 Co-Cr 合金的电化学行为。结果表明，对于所有合金，阳极溶解和点蚀敏感性随着 Tyrode's solution 流速的增加而增加，而开路电位和点蚀电位随着 Tyrode's solution 的增加而降低。Ti-Ni 合金的点蚀腐蚀比 Co-Cr 合金更容易。由于溶液的流动增强了氧气的转化，使其容易到达电极表面，氧气扩散控制的平台减小。所有这些都表明，在动态模拟体液中，阴极还原和电化学质量传输过程控制的腐蚀反应都得到了加速。
